一则清理MySQL大表以释放磁盘空间的案例 一.基本情况: 1.dbtest库554G,先清理st_online_time_away_ds(37G)表的数据,保留半年的数据: 1)删除的数据:select count(1),tdate from dbtest.st_online_time_away_ds where tdate < '2017-08-01';(记录数为:462171894) 2)保留的数据:select count(1),tdate from dbtest.st_online_t
检测磁盘空间,如果低于设置的预警值则发出一封预警邮件,这样的事情可以用SQL server的作业可以做,关键SQL语句如下例子所示: DECLARE @TableText NVARCHAR(MAX)='' ; --邮件正文declare @c int=15000 --C盘最低报警15G if exists (select * from tempdb.dbo.sysobjects where id = object_id(N'tempdb..#aa') and type='U')drop tabl
Get the current free disk space in PostgreSQL PostgreSQL获取磁盘空间 from eshizhan Here has a simple way to get free disk space without any extended language, just define a function using pgsql. CREATE OR REPLACE FUNCTION sys_df() RETURNS SETOF text[] LANG